Math, asked by varshinil2951, 4 months ago

Expand the following using identities:
(0.1x - 0.9)²

Solve in 9th standard method
PLEASE ANSWER AS SOON AS POSSIBLE

Answers

Answered by RvChaudharY50
3

Question :- Expand the following using identities:

(0.1x - 0.9)² ?

Answer :-

→ (0.1x - 0.9)²

using (a - b)² = a² + b² - 2ab , we have,

  • a = 0.1x
  • b = 0.9

then,

→ (0.1x - 0.9)²

→ (0.1x)² + (0.9)² - 2 * 0.1x * 0.9

→ 0.01x² + 0.81 - 0.18x

(0.01x² - 0.18x + 0.81) (Ans.)

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if a^2+ab+b^2=25

b^2+bc+c^2=49

c^2+ca+a^2=64

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(a+b+c)² - 100 = ...

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